G21.9
BillableSecondary parkinsonism, unspecified
Secondary parkinsonism, unspecified
Coding Notes
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
Excludes 2
Conditions not included here, but the patient may have both
- •certain conditions originating in the perinatal periodP04-P96
- •certain infectious and parasitic diseasesA00-B99
- •complications of pregnancy, childbirth and the puerperiumO9A)O00
- •congenital malformations, deformations, and chromosomal abnormalitiesQ00-Q99
- •endocrine, nutritional and metabolic diseasesE00-E88
- •injury, poisoning and certain other consequences of external causesS00-T88
- •neoplasmsC00-D49
- •symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classifiedR00-R94
Related Codes(6)
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(45)
SNOMED CT
UMLS
- Disorders presenting primarily with parkinsonismC0030569
- PARKINSON DIS SECONDC0030569
- PARKINSON DIS SYMPTOMATICC0030569
- PARKINSONISM SECONDC0030569
- Parkinson Disease, SecondaryC0030569
- Parkinson Disease, SymptomaticC0030569
- Parkinsonism, SecondaryC0030569
- Parkinsonism, SymptomaticC0030569
- SECOND PARKINSONISMC0030569
- SYMPTOMATIC PARKINSON DISC0030569
- Secondary Parkinson DiseaseC0030569
- Secondary Parkinson diseaseC0030569
- Secondary Parkinson's diseaseC0030569
- Secondary ParkinsonismC0030569
- Secondary parkinsonismC0030569
- Secondary parkinsonism (disorder)C0030569
- Secondary parkinsonism, unspecifiedC0030569
- Symptomatic Parkinson DiseaseC0030569
- Symptomatic ParkinsonismC0030569
- Symptomatic parkinsonismC0030569
- Symptomatic parkinsonism (disorder)C0030569
- parkinson's disease secondaryC0030569
- parkinsonism secondaryC0030569
- secondary parkinsonismC0030569
Clinical Terms
- Symptomatic parkinsonism (disorder)
- PARKINSON DIS SECOND
- Parkinson Disease, Secondary
- Symptomatic parkinsonism
- Parkinson Disease, Symptomatic
- PARKINSON DIS SYMPTOMATIC
- Secondary Parkinson Disease
- Parkinsonism, Secondary
- SYMPTOMATIC PARKINSON DIS
- PARKINSONISM SECOND
- Disorders presenting primarily with parkinsonism
- Symptomatic Parkinson Disease
- parkinsonism secondary
- Secondary parkinsonism (disorder)
- Secondary Parkinson's disease
- parkinson's disease secondary
- SECOND PARKINSONISM
- Parkinsonism, Symptomatic
Frequently Asked Questions
What is the ICD-10 code for secondary parkinsonism, unspecified?
The ICD-10-CM code for secondary parkinsonism, unspecified is G21.9. The full clinical description is "Secondary parkinsonism, unspecified". G21.9 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code G21.9 mean?
ICD-10-CM code G21.9 represents “Secondary parkinsonism, unspecified”. It is classified under Chapter 6: Diseases of the Nervous System and is a billable/specific code that can be used on a claim.
Is G21.9 a billable code?
Yes, G21.9 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is G21.9 in?
G21.9 is in Chapter 6: Diseases of the Nervous System (codes G00-G99).
What codes cannot be used with G21.9?
G21.9 has Excludes1 notes indicating codes that cannot be used together with it, including: Huntington's disease (G10); neurocognitive disorder with Lewy bodies (G31.83); Shy-Drager syndrome (G90.3); and 1 more.
What SNOMED CT codes does G21.9 map to?
G21.9 maps to 1 SNOMED CT concept: 230292008. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for G21.9?
G21.9 is linked to 1 UMLS Concept Unique Identifier: C0030569. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does G21.9 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like secondary parkinsonism, unspecified affect a person's functioning: body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of G21.9?
G21.9 maps to the ICD-11 code: 8A00.2Z (Secondary parkinsonism, unspecified).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.